At Thu, 20 Aug 2009 11:45:40 +0530 (IST),prashant chopade wrote:> > Hello,> > As per discussion, I know that ALSA driver does not have support for> simultaneous playback and recording. Huh? The full-duplex is of course supported.Your example shown in the thread doesn't indicate the multi playbacksor so. > We are using AD1981B codec, so our hardware has a support for> simultaneous playback and recording of an audio. I think you are confused. > So what exactly I have to do to get a support for simultaneous> playback and recording? > Shall I have to use sound server demons?> > Is it really possible to do simultaneous playback and recording in> linux? Define your meaning of "simultaneous playback and recording" moreexactly. If it's about full-duplex, the answer is definitely yes.If it's multi-streams, the answer is yes, but there are choices, e.g.dmix/dsnoop plugin or a sound server. Takashi > > Thanks & Regards,> Prashant C.> > > --- On Wed, 19/8/09, Takashi Iwai <tiwai@xxxxxxx> wrote:> > From: Takashi Iwai <tiwai@xxxxxxx>> Subject: Re: unable to do simultaneous playback and recording> To: "prashant chopade" <prashantchopade@xxxxxxxxx>> Cc: alsa-devel@xxxxxxxxxxxxxxxx> Date: Wednesday, 19 August, 2009, 5:50 PM> > At Tue, 18 Aug 2009 05:05:10 -0700 (PDT),> prashant chopade wrote:> > > > > > > > > > > > Hello,> > > > We using linux-2.6.27 on target board-AT91SAM9263EK.> > We are using ALSA library utilities (aplay &> > arecord). But by using these utilities we can’t do simultaneous playback and> > recording.> > > > > > > > We performed following activity to come to this conclusion:> > > > > > > > //At the background we were recording> > > > #arecord –f cd record_test_file &> > > > > > > > //At the forefront we were playing pre-recorded audio file> > > > #aplay –f cd pre_recorded_file> > > > > > > > Our observation is that, recording stops when start playing> > file.> > In the API side, the above should work fine. It must be the driver > that doesn't work with full-duplex.> > > Takashi> _______________________________________________> Alsa-devel mailing list> Alsa-devel@xxxxxxxxxxxxxxxx> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel> > > > Yahoo! recommends that you upgrade to the new and safer Internet Explorer 8. http://downloads.yahoo.com/in/internetexplorer/_______________________________________________Alsa-devel mailing listAlsa-devel@xxxxxxxxxxxxxxxxxxxx://mailman.alsa-project.org/mailman/listinfo/alsa-devel
